This study investigates the transitivity structure of research articles and examines the variations of process types across sections, aiming to explore experiential meaning construction in academic discourse. The corpus for this study consists of ten applied linguistics research articles published from 2018 to 2020 in the top journals of the discipline. Features of the transitivity structure of the whole research articles are presented. The distribution of different process types is also examined in relation to the rhetorical purposes and stylistic features of the abstract, introduction, method, results and discussion, and conclusion sections. The findings reveal that transitivity structure could largely reflect the stylistic features of research articles, which are characterized as being informative and objective as well as interpersonal. Results also show that the distribution of process types may contribute to the regularity manifestation and purpose fulfillment of distinctive sections. This study has implications for both academic writers and academic writing courses.